Swivel panels of the chimney type cooling towers
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Swivel panels principle of operation. Swivel panels principle of operation is semi-automatic, based on use of wind energy. |
2. Winter mode of operation.
Changeover from summer to winter mode of operation is done gradually as the outside air temperature goes down and necessity to regulate the quantity of the air coming into the cooling tower.
2.1.First of all, the folding shields must be closed, to follow with the manual adjustment of the air access by rotation of the swivel panel blocks to a certain angle with afterfixing.
2.2.Ice forming prevention in the under-sprinklers’ space, prevention of water subcooling, prevention of overburning of fuel by 10÷15%.
In order to prevent ice formation in the under-sprinklers’ space during spells of severe frost, the swivel panels must be completely closed and fixed in closed position.
In winter time the steer area of the panels must be free of snow drifts, ice crust and icicles.
2.3. Swivel panels must be visually inspected once a month.
2.4.Technical services are to be carried out as need be and by all means before and after the winter period of operation.
Conclusion: Installation of the swivel panels of new design (vertical) at the cooling tower No. 3 enabled us to increase the heat-extraction = 70 МW/hour at the air temperature minus 10 °С, at minus 20 °С the heat-extraction doubles due to reduction of steam consumption in the turbine condensers, stage No. 10 and 11 .
In summer season the panels operate in automatic mode under the wind force, thermal capacity of the cooling tower goes up by 25÷30%. Revamping pays back in 2÷3 months.